<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
</head>
<body>
    <input type="button" id="btn1" value="点我">
    <input type="button" id="btn2" value="解绑">
</body>
<script src="js/jquery-3.3.1.min.js"></script>
<script>
    //给btn1按钮帮定点解事件
    $("#btn1").on("click",function(){
        alert("点我干嘛？");
    });

    //通过btn2按钮进行解绑btn1的单击事件
    $("#btn2").on("click",function(){
        $("#btn1").off("click");
    });
</script>
</html>